Natick Mall came up as 13 miles from me in Cambridge on Google Maps, so if you do Downtown Boston it’s most likely Wellesley. I’m using the Pike and/or Route 9 as directly “west”

If you went Route 2 as west instead since it heads out to Wachusett, 10 miles only gets you to Walden Pond. You can’t even see Wachusett on 2 until at least Leominster